Inventor Saul Griffith looks for elegant ways to make real things, from low-cost eyeglasses to a kite that tows boats. His latest projects include open-source inventions and elegant new ways to generate power.

Inventor Saul Griffith looks for elegant ways to make real things, from low-cost eyeglasses to a kite that tows boats. His latest projects include open-source inventions and elegant new ways to generate power.